SEO Update for Base Template

[hoangvu5]

https://developers.google.com/search/docs/fundamentals/seo-starter-guide

Inside src/templates/base.html, add:

1. Open Graph block (optimized the card seen when PCS is shared on social medias):

<!-- Open Graph Tags -->
{% block og_tags %}
<meta property="og:title" content="ACM at FSU Programming Contest">
<meta property="og:type" content="website">
<meta property="og:url" content="{{ request.build_absolute_uri }}">
<meta property="og:image" content="{{ request.scheme }}://{{ request.get_host }}{% static 'img/acm_fsu_diamond.png' %}">
<meta property="og:description" content="ACM at FSU Programming Contest Registration & Management">
<meta property="og:site_name" content="ACM at FSU Programming Contest">
{% endblock %}
<!-------------------------------------------------------------->

2. Twitter Card block (optimized the card seen when PCS is shared on Twitter/X):

<!-- Twitter Card Tags -->
{% block twitter_tags %}
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="ACM at FSU Programming Contest">
<meta name="twitter:description" content="ACM at FSU Programming Contest Registration & Management">
<meta name="twitter:image" content="{{ request.scheme }}://{{ request.get_host }}{% static 'img/acm_fsu_diamond.png' %}">
{% endblock %}
<!-------------------------------------------------------------->

3. Organization block:

<!-- Structured Data - Organization -->
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Organization",
  "name": "ACM at Florida State University",
  "url": "https://fsu.acm.org",
  "logo": "{{ request.scheme }}://{{ request.get_host }}{% static 'img/acm_fsu_diamond.png' %}",
  "sameAs": [
    "https://www.facebook.com/ACMatFSU/",
    "https://www.instagram.com/fsuacm/",
    "https://discord.gg/4z3hNMA"
  ],
  "contactPoint": {
    "@type": "ContactPoint",
    "email": "contest@fsu.acm.org",
    "contactType": "Contest Inquiries"
  }
}
</script>
<!-------------------------------------------------------------->

The code above should be checked again for correctness.